I can’t believe I went out into the cold evening and started taking pictures of everything that makes a sound!!
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The calibration level is same for all cities up so far, I guess it’s a cumulative thing, the bar is not per city but all citys combined, could be wrong though
editsorry unintended reply to shota, was just a reguarl reply
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I uploaded a pic from Norfolk VA. - if were tracking time zones or continents.
Before i headed out i saw Dublin had a entry on the website! That’s you then huh?
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I actually wonder if we could get it to calibrate on stuff we say is on Antarctica actually.
Also a general notice, they are asking for “Public resonant percussion instruments” percussion means you can beat on it, resonant is the way it makes sound when you beat on it. Technically, that means wind chimes (not percussion) are out. As are quite a few other things making a sound. The only public ones in most places are actually church bells, though they could perhaps also be something like a Gong in Asia at some places.
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That is what I posted, the bell from my city church 
- it’s a nice looking bell haha
I just took a photo of a train crossing. Has bells. Will sound!
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it does help if i switch it to decrypt lol. it auto reset and i didn’t check it. thx for the reply! but how was that answer found tho?
I suppose a big old door knocker would do. Or a fire bell.
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golden ratio…example: https://designschool.canva.com/wp-content/uploads/sites/2/2015/10/14.png
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Quote from the latest CSD mail:
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It should be public though… maybe a door knocker is too small to be considered “public” idk
Took a picture of my wind chimes here in Jacksonville, FL
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What do you think are the 100 license keys for the Mercury Process?
Steam keys for the game.
Most likely another 100 free steam keys for No Man’s Sky.
Math teacher here. Finally my protractors came to good use! I never thought I’d actually be using a protractor EVER outside the classroom. 
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Thanks for the reply. But how the heck do you get lead from C, D, E, F…?
I’m sure Golden Ratio (?) will be even more obtuse…
I also have an interesting problem. My mailbox was blown up by some punk kids, which means I have forgotten mail sitting at the post office, unless it went back already…
Check this post: https://forums.etarc.org/t/phase-2-topic-2/1574/252
to see how the “golden spiral” was applied to the original given image. ( Golden spiral - Wikipedia )
Look on the outer wheel, they contain 4 characters over CDEF, namely:
c = W, D = OS, E = PT, F = 80 (HG). Those are elements in the periodic table, each jumps +2 to the right, so the next is PB(82) Lead.
You can use the table here to try it out yourself: Periodic table - Wikipedia
Also, @puzzle I stand corrected, it seems wind chimes are actually classed as percussion instruments too, guess I’m not too old to learn.